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All results from a given calculation for C2H5CN (ethyl cyanide)

using model chemistry: PBE1PBE/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at PBE1PBE/6-311+G(3df,2p)
 hartrees
Energy at 0K-171.912195
Energy at 298.15K 
HF Energy-171.912195
Nuclear repulsion energy103.342336
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at PBE1PBE/6-311+G(3df,2p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3145 3145 13.43 68.61 0.69 0.82
2 A' 3064 3064 15.64 36.48 0.07 0.13
3 A' 3061 3061 3.12 244.05 0.02 0.04
4 A' 2379 2379 12.86 91.24 0.17 0.29
5 A' 1500 1500 6.55 2.88 0.72 0.84
6 A' 1466 1466 6.80 7.55 0.69 0.81
7 A' 1411 1411 2.02 0.66 0.41 0.58
8 A' 1345 1345 3.05 2.77 0.43 0.60
9 A' 1094 1094 3.87 5.50 0.12 0.21
10 A' 1036 1036 0.50 3.29 0.46 0.63
11 A' 855 855 0.06 5.54 0.07 0.13
12 A' 557 557 0.86 1.44 0.19 0.31
13 A' 213 213 4.39 2.05 0.71 0.83
14 A" 3148 3148 12.00 24.58 0.75 0.86
15 A" 3099 3099 0.25 80.58 0.75 0.86
16 A" 1492 1492 8.70 5.08 0.75 0.86
17 A" 1285 1285 0.02 1.92 0.75 0.86
18 A" 1107 1107 0.41 0.09 0.75 0.86
19 A" 785 785 3.94 0.43 0.75 0.86
20 A" 398 398 0.39 1.45 0.75 0.86
21 A" 220 220 1.06 0.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16329.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16329.1 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at PBE1PBE/6-311+G(3df,2p)
ABC
0.94244 0.15800 0.14245

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.507 0.561 0.000
C2 0.000 0.807 0.000
C3 -0.766 -0.430 0.000
N4 -1.358 -1.416 0.000
H5 2.037 1.514 0.000
H6 1.810 -0.002 0.882
H7 1.810 -0.002 -0.882
H8 -0.298 1.386 0.877
H9 -0.298 1.386 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52662.47963.48071.09001.08981.08982.16982.1698
C21.52661.45482.60422.15622.17002.17001.09291.0929
C32.47961.45481.14953.41112.75672.75672.07102.0710
N43.48072.60421.14954.48413.58003.58003.12163.1216
H51.09002.15623.41114.48411.76811.76812.49762.4976
H61.08982.17002.75673.58001.76811.76492.52433.0770
H71.08982.17002.75673.58001.76811.76493.07702.5243
H82.16981.09292.07103.12162.49762.52433.07701.7543
H92.16981.09292.07103.12162.49763.07702.52431.7543

picture of ethyl cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 112.522 C1 C2 H8 110.759
C1 C2 H9 110.759 C2 C1 H5 109.858
C2 C1 H6 110.968 C2 C1 H7 110.968
C2 C3 N4 179.236 C3 C2 H8 107.910
C3 C2 H9 107.910 H5 C1 H6 108.409
H5 C1 H7 108.409 H6 C1 H7 108.145
H8 C2 H9 106.747
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.462      
2 C -0.098      
3 C 0.881      
4 N -1.043      
5 H 0.124      
6 H 0.146      
7 H 0.146      
8 H 0.153      
9 H 0.153      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.372 3.432 0.000 4.172
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.298 -3.853 0.000
y -3.853 -27.753 0.000
z 0.000 0.000 -23.954
Traceless
 xyz
x -1.445 -3.853 0.000
y -3.853 -2.127 0.000
z 0.000 0.000 3.572
Polar
3z2-r27.144
x2-y20.455
xy-3.853
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.527 1.183 0.000
y 1.183 6.733 0.000
z 0.000 0.000 5.008


<r2> (average value of r2) Å2
<r2> 87.545
(<r2>)1/2 9.357